SCALE INSECTS OF THE GENUS PARLATORIA 23 
synonym of blanchardi Targ., and lack of adequate material pre- 
cludes comment on phyllanthi Green (25, p. 350) and virescens Mask. 
(39, p. 300). Specimens of mytilaspiformis Green (24, p. 164) from 
Psychotria thwaitesii, Pundaluoya, Ceylon, August 1898, presumably 
part of the type material, and of this insect as reported from tea 
plant by Green, collected in the Udagama district, Ceylon, October 
1898, from lots presented to the collections by E. E. Green many 
years ago, have been examined. From this examination it is con- 
cluded that the specimens from tea plants exhibit characters coming 
within the limits of proteus as here recognized, but that the specimens 
from Psychotria are plainly different, lacking the spurs near the 
body margin opposite the anterior spire acles, the membranous pocket 
between posterior spiracles and margin, and microducts on the dor- 
sum of the pygidium above the anterior lateral paragenitals; in 
addition, the submar ginal dorsal tubular ducts are considerably more 
numerous, averaging around 385 to 40 in the specimens examined. 
Although mytilaspifor mis is thus established as distinct from proteus, 
and likewise appears to be distinct from the other species included 
in this publication, its relationship to the remaiming species or varie- 
ties described in Parlatoria cannot be definitely settled at this time. 
Adult female.—KEyespot appearing as a triangular spur, usually strongly de- 
veloped but sometimes weak. Anterior spiracles with 1 to 3 disk pores adja- 
cent to each, usually, however, with 2 such pores; posterior spiracles with a 
relatively distinct and conspicuous derm pocket about halfway to the body mar- 
gin. Duct tubercles comparatively small and inconspicuous, stout conical, more 
slender posteriorly; numbers on each half of body as follows: Prespiracular, 
usually 1, range 1 to 3, average 1.2; anterior Spiracular, range 0 to 4, average 
1+ ; intermediate, range 0 to 6, average 3.2; posterior Spiracular, range 2 to 
7, average 4; first abdominal, range 2 to 6, average 3.3; totals, range 7 to 25, 
average 12.3. Dorsal submarginal tubular ducts moderate in number, the ob- 
served range 11 to 25 for one side of body, with an average around 18. No 
dorsal intermediate macroducts, but one cluster of microducts on each side im- 
mediately above anterior lateral paragenital cluster and another along anterior 
edge of general dorsal thickening of pygidium, the first-mentioned cluster rang- 
ing from 1 to 5 in number, the second from 38 to 7. No constantly occurring 
cicatrices noted on abdominal dorsal segments, and no constant tiny sclerotic 
flecks observed on dorsum of pygidium. The 3 developed pairs of lobes small, 
almost equal in size to somewhat graduated, lightly notched on both inner 
and outer margins, inner margin of third lobe usually hardly more than sinuate ; 
fourth and fifth lobes represented by projections of pygidial margin that closely 
simulate adjacent plates but are usually smaller and somewhat variable in 
details of outline, basal constriction, and extent of fimbriation. Plates between 
lobes much as in other species, those outside of third lobes up to fifth lobes 
broad and short in comparison with those of some other species. Paragenitals, 
as far as observed, constantly in 4 small groups, exhibiting some variation in 
number of pores in each group, in the material critically examined showing a 
range in anterior laterals of 3 to 8, average 6; in posterior laterals of 3 to 6, 
average 5; totals, range 17 to 26, average 21. 
This species, as here recognized, has a wide distribution and 
considerable variety of host-association records. The bulk of the 
records for which material has been examined fall in two plant 
families, Orchidaceae and Palmae, and on this account most of the 
records listed below have been grouped by plant family. Speci- 
mens placed as this species have been examined in Orchidaceae on 
various species of Aerides from England, France, Philippine Islands, 
Java, and India; on Arachnante rosea from Straits Settlements ; on 
various species of Brassia from Dutch Guiana; on various species of 
Cattleya from Louisiana; on Coelogyne flaccida from District of 
